Help I got a link to a site from a thread and now cant find it again. It had a list of things to consider and I would like to find it again.

Cant say much about it other than I think it started out with the the 3 most inportant things like making sure they do a J and D, and balance it with a airflow meter, and something else.

please somebody know whos site this was and give a link back to it
thanks